userInfoHelper.deleteUserCodeFromCookie(request);
                return getHtmlResponse();
            });
            if (ComponentUtil.getFessConfig().isValidAdminPassword(password)) {
                return loginRedirect;
            }
            getSession().ifPresent(session -> session.setAttribute(INVALID_OLD_PASSWORD, password));

        final String value = getHttpFileuploadThresholdSize();
        return value != null ? DfTypeUtil.toLong(value) : null;
    }

    String getPasswordInvalidAdminPasswords();

    default boolean isValidAdminPassword(final String password) {
        return !split(getPasswordInvalidAdminPasswords(), "\n")
                .get(stream -> stream.map(String::trim).filter(StringUtil::isNotEmpty).anyMatch(s -> s.equals(password)));
    }

        }

        if (fessConfig.isPasswordRequireSpecialChar() && !containsSpecialChar(password)) {
            return "errors.password_no_special_char";
        }

        if (!fessConfig.isValidAdminPassword(password)) {
            return "errors.password_is_blacklisted";
        }

        return StringUtil.EMPTY;
    }

    /**